Common Emitter PNP Relay (CB25611E)

This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by voltage according to the relay.

Automatic Telephone Recorder (CB5992E)
This circuit turns on an old cassette recorder when the telephone rings, thus enabling the...
6V Charger (CB4790E)
This circuit was found in a Poptronics of the 90's. The circuit limits the load current to 0.6 A....
High Power Switch Using SCR (CB540E)
Incandescent lamps and heaters can be controlled by a low power switch using this circuit. The...